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LOCK.

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No. 488,091.l Patented Ded. 13,1892.

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Wim? mm n UNITED .STATES PATENT OFFICE.

JOHN F. SCHLOSSSTEIN, OF BUFFALO, WISCONSIN.

LOCK.

SPECIFICATION forming part of Letters Patent No. 488,091, dated December 13, 1892.

Application filed April 7, 1892. Serial No. 428,156. (No model.)

To all whom it may concern:

Beit known that I, JOHN F. SoHLosssrEN, of Buffalo, in the county of Buffalo and State 0f Visconsin, have invented certain new and useful Improvements in Lock-Bars; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to' make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon` which forni a part of this specication.

Myinvention consists of a special construction whereby a lock bar or bolt for a barn or other door may have a combination which will prevent the unlocking of the door by any one who does not know the special andonly combination by which it was locked and by which onlyit can be unlocked. The construe` tion will be made apparent from the following description.

In the drawings, Figure 1 is a perspective View of a lock-bar embodying my invention shown as applied to a door, say, of a barn, and with the lid or cover of its inner mechanism somewhat raised. Fig. 2 is a cross-section in the line oc oc of Fig. 8, the blocks, hereinafter named, being removed. Fig. 3 is a plan of one of the notched ribs or partitions of the lock-bar; Fig. 4, a plan of one of the removable blocks; Fig. 5, a cross-section in the line y y of Fig. 8; Fig. 6, an edgeview of one of the slide-keys; Fig. 7, a similar View of a slightly-different key having a prolongation beyond its short bent part; Fig. 8, a plan of the inside of the apparatus, the lid being removed or raised.

Within a case A,which is shown as secured to the inside or back of a door B, is a slide bar or bolt C, the main portion of which may be made with a series of two or more longitudinal deep parallel grooves d, being the spaces n between the longitudinal ribs or partitions jintercepted by transverse partitions or fillings g at regular intervals, thus constituting a series of grooved qu adrangular boxes bounded by the outer Walls of the bolt or bar C, and by such llings these boxes being separated into narrow compartments extending lengthwise of the bar by the longitudinal ribs f,the spaces between which form the grooves L, which I Will now describe.

'8, serves to fasten the door, and the remainder of this bolt may be described as an uncovered box having a series of lengthwise partitionsfand a series of vertical partitions or fillings g, thus forming n umerous small chambers I. Loose removable blocks or pins K are provided adapted to be readily and interchangeably inserted in any one of these chambers I; but their numbers are as many less than the number of chambers as there are keys These keys are simply flat strips of metal, each having a bent portion or hook m, adapted to freely enter the notches n, made in the partitions or ribsfof the box and capable of being pushed or pulled crosswise of the box, so that the part m may be brought to coincide with anyone of the chambers I. These keys may terminate in the bent part m, as in Fig. 6, or may be extended beyond it, as shown in Fig. 7, so as to project entirely through the lock at its inside, as well as at its outside, but not so far.

P is a hinged dooron the inside face of the lock.

Q is an outside handle projecting through a slot p in the door and serving to slide the bolt either for locking or unlocking; but it cannot be used for the purpose of unlocking unless the combination by which it was locked be known.

Suppose the bolt has tive parallel rows of chambers I and five keys, as shown. All these chambers, excepting tive, (arbitrarily selected,) are then filled with their respective blocks, and these blocks have a height such as prevent the sliding of the bolt `whenever any one of the bent parts m comesv in contact with the end of any one of such blocks. Hence no unlocking can take place until each and all of the keys shall first by a knowledge of the predetermined combination and arrangement be adjusted so that each and all of the bent parts m shall be in line with such of the charnbers I of its adjacent box which shall have been left unfilled when the door was locked. By way of an illustration I have shown the IOO two left-hand upper chambers, the two righthand lower ones', and a central one unfilled.

It Will be evident that if the several proj ectionsm are in position to coincide with these unfilled chambers the bolt Will be free to move in one or the other direction, dependent only upon Whether these projections be at the right or left side of the chambers. If any one of these projections m be not in line with an unfilled chamber, the bolt cannot be shifted, because such projection then abuts against the block.

It will be seen that with live keys and live sets of chambers the possible permutation of changes in the combinations Will be practically unlimited, inasmuch as each and every key may by the transposing of the blocks be excluded from engaging with any one or more of its adjacent chambers l.

It will be evident that the num bers of chambers, and consequently the numbers of the blocks and keys, may be less or more, as desired, thel principle of the construction, however, being still the same.

No portable or pocket key is needed and no padlock or other similar contrivance to fasten or release the bolt. The device is complete within itself.

I do not claim, broadly, a set of parallel grooves nor a set of keys Working transversely of the same; but

I claim- 1. A lock bolt or bar having Within it two or more longitudinal parallel grooves divided into separato chambers, combined With a set of removable and interchangeable blocks or. vpins adapted to `be loosely lodged in such chambers and a set of adjustable hooked keys corresponding in number to the number of grooves, the combination being and operating lsubstantially as set forth.

J OHN F. SCHLOSSSTEIN. Witnesses:

THEO KELLER, RUDOLF MUELLER. 

